Other Parts Discussed in Thread: DAC37J82
I have dac37j84 on a custom board, and its SERDES PLLs doesn't want to lock.
I understood it by reading 0x6C register - it's value is 0x000F (yes, I've tried to reset it to 0x0000).
Reference to SERDES PLL is DACCLK, which is 390.625 M.
SERDES divider is 1.
SERDES multiplier is 5, SERDES clock is 390.625 M * 5 = 1953.125 M.
DAC is operating at full rate, so linerate = SERDES clock * 4 = 7812.5 M.
L = 3 (4 JESD lanes), lanes 0-3 are enabled (yes, I've tried to enable all lanes).
M = 1 (2 streams per frame)
F = 0 (1 octet in the frame)
K = 19 (20 frames in multiframe)
SYSREF is 39.0625 M, but it is disabled, according to Initialization Set Up (I also tried with enabled SYSREF).
I've also tried to reset DAC through RESETB pin - registers became default, then I programmed it again - that didn't help.
PLEASE help me, what should I do?
Here is my full config: